vserver 1.9.3

[linux-2.6.git] / include / asm-um / fixmap.h

diff --git a/include/asm-um/fixmap.h b/include/asm-um/fixmap.h
index 0e8a4c1..ef4890b 100644 (file)
--- a/include/asm-um/fixmap.h
+++ b/include/asm-um/fixmap.h
@@ -34,6 +34,7 @@ enum fixed_addresses {
        FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
        FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
 #endif
+       FIX_VSYSCALL,
        __end_of_fixed_addresses
 };
 
@@ -63,6 +64,13 @@ extern unsigned long get_kmem_end(void);
 #define __fix_to_virt(x)       (FIXADDR_TOP - ((x) << PAGE_SHIFT))
 #define __virt_to_fix(x)      ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
 
+/*
+ * This is the range that is readable by user mode, and things
+ * acting like user mode such as get_user_pages.
+ */
+#define FIXADDR_USER_START     (__fix_to_virt(FIX_VSYSCALL))
+#define FIXADDR_USER_END       (FIXADDR_USER_START + PAGE_SIZE)
+
 extern void __this_fixmap_does_not_exist(void);
 
 /*